Device on loom



NOV. 4, 1958 G KUMMER -2,858,856

^ DEVICE oN LooM Filed Apr-11 11, 1955l s sheets-sheet 1 NOV. 4, 1958 G, KUMMER 2,858,856

DEVICE: 0N LOOM Filed April 11. 1955 Y s Sheets-sheet 2 NGV. 4, 17958 G, KUMM'ER 2,858,856

DEVICE oN LOOM Filed April 11, 1955 svsneets-sheet s Unid States Patent C z,sss,ss6

DEVICE N LOOM Gustav Kummer, Erlenbach, Switzerland Application April 11, 1955, Serial No. 500,607

Claims priority, application Switzerland November 26, 1954 3 Claims. (C1. 139-144) The present invention relates to a device on looms for pneumatic shuttle control.

From known pneumatic shuttle control mechanisms the device according to the invention is distinguished in that on both sides of the fabric or warp shed there is a guide cylinder joined to a source of compressed air and stationarily mounted on the loom frame, and on which a compressed air cylinder axially slidable within two end positions is supported; further that each guide cylinder is at its projecting end furnished with a stationary plunger closing hermetically in relation to the movable compressed air cylinder and dividing the latter into two pressure chambers, of which the outer chamber serves to propel the compressed air cylinder or the shuttle, and the inner chamber to restore the pressure cylinder from its operative into its inoperative position. Moreover, according to the invention, the hollow space of the guide cylinder constantly communicates via channels with the inner pressure chamber, whereby the hollow space of the guide cylinder can intermittently be brought into connection with the outer pressure chamber through an inlet valve, for the control of which provision is made for a carriage rigid with the movable compressed air cylinder and serving as picker and catcher device for the shuttle. Moreover, according to the invention there is provided an outlet valve which, with the inlet valve open, is closed and, with the inlet valve closed, connects the inner pressure chamber to atmosphere, while for opening the inlet valve there is a cam arranged on said carriage and meeting in its path of movement a roller supported by one end of a toggle lever which at its other end engages a control lever fulcrumed on the one hand to a stationary bearing and engaging on the other hand a Valve stem carrying the body of the outlet valve and protruding centrally through an air discharge tube arranged coaxially within said guide cylinder. Furthermore, according to the invention, for closing the inlet valve and subsequently opening the outlet valve, provision is made for a second control lever engaging said valve stem and connected through a draw-member to a slide which, by means of a slot extending obliquely to the carriage and a stationary bolt engaging therein, is supported on a fixed part of the loom and projects in one end position into the path of movement of a roller mounted on said carriage, the arrangement being such that upon impingement of the shuttle onto the catcher device of the carriage, the rst control lever is deected by the cam and toggle lever, thereby opening the inlet valve so as to cause compressed air to enter from the hollow space of the guide cylinder into the outer pressure chamber and thereby to move the compressed air cylinder axially away from the guide cylinder to pick the shuttle via carriage, the whole further in such a way that the rollei mounted on the carriage, prior to reaching the outer end position of the compressed air cylinder, engages the slide and simultaneously deflects and displaces it, the second control lever being deflected through the pulling member thus causing the inlet valve to close and thereupon the outlet valve 2,858,856' Patented Nov. 4, 1958 ICC to'open, so that the air pressure drops in the outer pressure chamber and the air escapes to atmosphere, while the compressed air contained in the inner pressure chamber again brings the compressed air cylinder back to normal which had travelled into the end position.

The laccompanying drawing shows by way of example a preferred form of embodiment incorporating the invention.

Fig. 1 is a horizontal section through one device; an identical device being arranged, in mirror-image to that shown, on the other side of the warp shed;

Fig. la is a view similar to Fig. 1 showing the right hand end of the device;

Fig. 2 is a top View of the device shown in Fig. 1, with various parts in a different position, and partly broken away;

Fig. 2a is a view similar to Fig. 2 showing the right hand end of the device;

Fig. 3 is an end view of the device, partly broken away;

Fig. 3a is a View similar to Fig. 3 showing the right hand end of the device;

Fig. 4 is the device seen in direction of the arrow IV indicated in Fig. 2.

Fig. 5 is a detail view of the assembly shown at the left-hand end of Fig. l illustrating a further position of the parts, and

Fig. 6 is a view similar to Fig. 5 illustrating another position of the parts.

Stationarily mounted on both sides of the web or warp shed of the loom is a hollow guide cylinder 8 joined to a source 1 of compressed air. Said guide cylinder 8 ts with one (in Fig. l leftsided) end in a stop socket 19 mounted in a stationary part of the loom frame. Inserted at the projecting extremity of the guide cylinder 8 is a valve body 14 having a cylindrical extension 13 reduced in diameter with respect to the guide cylinder and having firmly arranged at its extreme end a plunger 15 fitted with a gasket 16. The body 14 is secured on a tube 14a xed in a stationary part of the loom and the tube 14a is provided with a slot 14b, the function of which will be later described.

The guide cylinder 8 has a compressed air cylinder 7l axially slidably supported thereon. Said compressed air cylinder, closed at its'outer end by a cover 7a, is on the one hand supported on plunger 15, 16 and on the other hand, by means of a sleeve, slidable on the guide cylinder 8. The sleeve 6 includes a gasket 16 adapted to close the compressed air cylinder 7 hermetically in relation to the guide cylinder 8. Through said plunger 15, 16 the compressed air cylinder 7 is divided into two pressure chambers 22 and 22a, the inner chamber 22 being of smaller cross-sectional area than the outer chamber 22a.

The hollow space 8a of the guide cylinder 8 communicates via ports 23 with the inner pressure chamber 22. Located in this pressure chamber is a disk 12 guided axially slidable both on the inner wall of the compressed air cylinder 7 as well as on the cylindrical extension 13 of the guide cylinder. Numeral 11 designates the plate, and 14 the seat of an inlet valve arranged within the guide cylinder 8 and which, in its open position, Fig. 2,

connects the hollow spacey of the guide cylinder 8 via hollow extension 13 to the outer pressure chamber 22a of the comprsesed air cylinder. Said plate 11 of the inlet valve is seated on the inner end of a tube 9 arranged coaxially to the guide cylinder 8, the other 'end thereof opening to atmosphere. The valve plate 11 is provided with bores 11a adapted to connect the hollow space of tube 9 to the hollow space of the valve seat 14. Numeral 10-denotes another valve plate situated within the inner space of the valve seat 14 and forming together with the plate 11 of the inlet valve, the outlet valve. The

` at one endet, .aetosele leyer..39

valve plate is seatedon a valve'stem 10 which protrtiles .eoazially throught@ .slisellatsetybe 9- For opening the inlet valve 11, 14 an'd simultaneously i or subsequently closing the=outlet valve 10, 11, provision insasnieker. arid;.eateher guidediby means-.of roll- @to-.enter tberath .ofymoyementtof airol.

1ad --toeg-le lever )39, provided at the common joint with a roller 25, is v at 'the .otherseod linked-fte. a-.eontroltlever 1.7 .rwhlehiin its turn 1 isoseillatably supported bya bolt- 405 .on afstationaryfnart 28 of the loomfiframe.. .ln. Failfthe rollenzwovitate the .Cam .1&4 otra butter .leverrlraf .er-med .en .afbelt 18b anchored in the stationary part; 1,8 ,of itheloom. Numerel 47 Yindicatesa.tensioritsrniing-whiehat one .eo-Cl .engages ,the Ybuffet lever4 .1 8 and. .atthe-.other .end a ,rantilever 39a of the toggle linkage 39 and tends to keep the bulerlever 18m-.Contact Withranadjustable abutment.-

For closing the inlet valve 11, 14-. an d for simultaneous .or immediately ...Subsequent. openingdof the outletvyalve 10, 11, therev is provided a control lever 42, Fig. 3, eneasing .the valve-stemde', .Saidepntrol leverls .at one end pivoted to a link 42a, at the Lot h er,end to arpulling inflenlber 43, and :furnished with ,a presser Y4217 which,

in the position as in Fig. 3, bears on the control -lever 17- .Said pull. member .4,3 Stands Yi11-*pivotalconnection us y,start from Fig. l and also from the supposition that Athe inner space of the guide cylinder 8 be underv pressure Vwh ic h,. via ports 23, is also imparted tothe inner pressure chamber `.22 ofthe movable .Compressed air cylinder 7. For starting .the pneumatic shuttle'control, the control lever 1 7 is swung-anticlockwise in a waynotparticularly described, in Fig. l, and thus'the valvestem 10' is displaced in the -directionof the arrow A indicated in Fig.l. As a result of this. :displacement ofthe valve stem 10', the valve plate 10 iseaused to seat onto the valve platev11 ,au d thus closes the, outlet Valve 10, 11. Upon further displacement .of Ythe `valve stem 10 in ,the ldiretion of the arrow .A,.the valve plate 11 is moved clear of the valve seat-'14, thusopening the inletvalve 11,

\ 1.4 (Fig-12) wherebyar flows .from .y chamber 8a or 1.4,A the same. `being .connected-by. :the .s1ot14b through t.the, opened valve parts;11,;14 and tube 14 linto the .chamber 224, the compressed air cylinder -7 Ybeing thereby lurgedforwards into .the positionapparent from Fig. 2

and ypicks xt he, sl n 1 tt le-across the warp shed over carriage .and buffer connected. tss-cylinder 7. Towards the end of theadvance ofsaid vcylinder '7, thel forward end ,of the Sleeve 6v abuts on the disk 12 and carries same along. Due to over-compression, ofair therebyarising -in chamber 22, the advancing cylinder7 willbe braked.

` By suitably dimensioning .theports 2;3 .it ,may :be achieved that the vcompressed air cylinder 7 comes to-rest shortly l before the disk 12 contacts the plullgerl 15 Approximately at the moment yin which the sleeve 6 i contacts the vdisk 12, the roller 37 mounted on carriage f 10 vgets displacedv contrary .tothe direction ,offv the arrow ,Xalye...l9.1.1 .oneneias .illustrated .infie-..1-

will be closed and the outlet `.O n' ,opening the outlet valve 10, 11 the pressure drops immediately in the outer pressure chamber 22a and the air ows through the hollow extension 13, the opened outlet valve 10, 11 and tube 9 to atmosphere. Since, however, the inner chamber 22 continues ftoremain under pressure, the disk 12 and hence also the compressed air cylinder 7 will he displaced in the'direction of the arrow C indicated in Fig, l, and-,be.cause .ofthe eompressed'airentering via disk 12 in'to the hollow space 41 between guide cylinder 8 and compressed air cylinder 7, the latterwill be returned tothe starting position -as shownin Fig. 1. At the end of the resettingof-cylinder 7, .the sleeve 6 enters the stop socket 19, thus compressing the air therein. Thereby an air cushion-will for'm ..in' the'stop lsocket to brake the resetting movement of cylinder 7.

When the shuttle 3 cornes against the buffer 31, the @81u27y .on -earriage 20. lknocks on-rollerraising this and swinging the control lever 17 .fariticlockwiseviaitoggle .linkage .39.. Thereby .thevalvestern 10' is .again 'displaced ,in the direction Aof .the .arrow A, ithe .outlet valve 19,131gwil1 be .closed and subsequently the inletvalvefll, 14 `opened so that .compressed air from `the .hollow `space of-theguide cylinder .8 reenters. :through the hollowfextension';1 3.finto =the.oute r pressure chamber 22a, which again causes the y,cylinder 7 .to .propel .to -shootthe shuttle.

Asshown .in Fig.1,'the.ringflange 3 adapted to con'.- Ilect the compressed .air cylinder 7.,;to the carriage() possesses slight .axial .clearance onv the. sleeve fstoallow said Carriage, Vwhen the shuttle .meets the-buierzlpito -rnove in the .way of actuating thecontrol lever -17rela tiv e to thecylinder 7. `The same purpose is alsoserveduby an elastic intermediate disk I3,2 interposedv betweenringiiange 3 and attachment eye 33 of .the carriage.

In rorder to damp Athe knock arising when the .eama27 meets the roller 2 6, provision is made. for thebufter lever 18 being then Icaused to swing clockwise. about thebolt 18b against the action of spring vT11-through the intermediary of toggle linkage 39 and roller 2,5,.ato be then restored to normal by'spring 47, WheIQhY-'the control lever 17 vis swung anticlockwise. Withvthe help .of the set secrew 38, the path of swing of theihuffer lever 18 may be limited to one direction of turning.

What I clairnis: v

l. In a pneumatic control for theshuttle of loQms,;a .loom frame, .a Shuttle, guide .Cylinders stationarilyiarranged 0n the loomjrarne on both sides of the, she l, a source of vcompressed airv infcommunicationwithlthe snide Cylinders, 1a Compressed .air -Cylinder axially slid.- a'ble upon each guilecylinder between two y end.f. p c J s i tionsja stationary plungerat the end of each guidecylinder closing hermetically relative to the compressedair cylinder andserving to divide Athe vcompressedair cyl- Vinder intoouter and inner; pressure chambers, theouter chamber functioningto propel the shuttle and the .inner chamber tore-set the compressed air cylinder frornan .operative to -an inoperative position, means defining a hollow ,space within the guide cylinder, port ,means .coacting with the hollow space and A.the inner c, hain b er y whereby the hollow space and inner chamber `,are ,in constant eommunieatiom aninlet valve means. Coaoting With .the .hollow ...Space and .the outer. pressure ehambler whereby the .hollow .space .can be .intermittently oon- AHeated with .the outerPreSsure Chamber, eontrolmeans for: the .inlet valve .means vincluding a carriage. associated Awiththe compressed air cylinder and serving as apicker and catcher device for the shuttle, an outlet valvewhich, when .the inlet valve means is open, is closed 4. ,anjcL which when the inlet valve means is closed, kcori- .nects the outer pressure chamber with the-atmosphere, ,means for opening thenlet valvafsueh opeoitistmeans ineludinaaeam .fixed to the Carriage@afrollerztlisresed into the-path `of movementoof the cam, atoggle'flever A, the inlet valve 11, 14

carrying the. roller at one end thereof, av-controlzleyer fulcrumed at one end to the loom frame, a connection between the Aother end of the toggle lever and the control lever, a valve stem carrying the outlet valve body engageable with the other end of the control lever, an air discharge tube arranged coaXially within the guide cylinder through which said valve stem extends coaxially, means for closing the inlet valve and the subsequent lopening of the outlet valve, such closing means comprising a further control lever engageable with the valve stem, a slide having a slot therein extending obliquely to the path of movement of the carriage, a xed pin on the loom frame lodged in the slot with the pin and slot providing supporting means for the slide, a drawmember connecting the further control lever to the slide and a roller on the carriage so that in one end position the slide projects into the path of the roller on the carriage whereby the impingement of the shuttle on the picker and catcher device causes the control lever to swing by the action of the cam and toggle lever thus opening the inlet valve whereby compressed air from the hollow space enters the outer pressure chamber thereby moving the compressed `air cylinder axially away from the guide cylinder so that the carriage shoots the shuttle and the roller on the carriage prior to reaching the end position of the compressed air cylinder begins to rise on the slide thereby swinging and displacing the slide and causing the further control lever to swing by virtue yof the draw-member to etect closing of the inlet valve and the subsequent opening of the outlet valve so that the pressure of the air in the outer chamber will drop and the air escape to atmosphere while the compressed air in the inner chamber will cause the compressed air cylinder to return to its starting position.

2. A pneumatic control as dened in claim 1 wherein a disk is arranged Within the inner pressure chamber and is axially slidable along the inner wall of the pressure chamber and a reduced extension of the guide cylinder, respectively.

3. A pneumatic control as defined in claim 1 wherein at the common joint of the toggle is arranged a fulther roller operatively connected to a cam on a butter lever pivoted to the loom frame and a tension spring connected to the `buffer lever and a cantilever on the toggle tends to maintain the buffer lever in engagement with an adjustable abutment.

References Cited in the tile of this patent UNITED STATES PATENTS 2,538,530 Kronoff Ian. 16, 1951 FOREIGN PATENTS 17,435 Great Britain Jan. 27, 1910 

